JP7211638B2 - canned motor pump - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canned motor pump, and more particularly to a canned motor pump with improved efficiency in releasing heat generated during operation of the canned motor.

As a conventional canned motor pump used for liquid supply, there is, for example, the one described in Patent Document 1. As described in Patent Document 1, the conventional canned motor pump includes a canned motor, an impeller rotationally driven by the canned motor, metal holding means surrounding and holding the canned motor, and the It is composed of a plastic pedestal that holds the holding means, and a front cover and a rear cover that are attached to the pedestal so as to cover both front and rear sides of the canned motor.

This conventional canned motor pump can maintain sufficient mechanical strength by making the holding means for holding the canned motor from a metal material, but the pedestal holding the metal holding means uses plastic. Therefore, the efficiency of releasing the heat generated during the operation of the canned motor to the outside may be insufficient.

Taiwan Utility Model Registration No. M577069

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a canned motor pump in which the heat generated during operation of the canned motor is released to the outside with improved efficiency.

In order to achieve the above object, the present invention provides an inner peripheral surface surrounding a fixing frame receiving hole extending in the front-rear direction parallel to the axis outside a predetermined axis and extending from the first front end surface to the first rear end surface. a base unit formed of a plastic material in a substantially annular shape, and a base unit that is fitted and fixed in the fixing frame accommodating hole of the base unit, and that extends along the front-rear direction of the base unit. is formed of an aluminum alloy material in a substantially annular shape so as to surround a motor housing hole extending from a second front end surface corresponding to the front end surface of the base unit to a second rear end surface corresponding to the first rear end surface of the base unit. a fixed frame, motor means fitted into and fixed to the motor housing hole of the fixed frame, and a front cover attached to the base unit so as to cover the first front end surface of the base unit. , wherein the fixed frame has an outer peripheral surface facing the inner peripheral surface of the base unit, a plurality of slot areas opening toward the inner peripheral surface of the base unit, and the plurality of slot areas. A partition wall is formed between the inner peripheral surface of the base unit and the outer peripheral surface of the fixed frame, and has an opening toward the second rear end surface side, and is located in the slot area. To provide a canned motor pump characterized in that a communicating vent space is defined.

As described above, the canned motor pump of the present invention has an opening facing the second rear end surface between the inner peripheral surface of the base unit and the outer peripheral surface of the fixed frame. , since a ventilation space communicating with the slot area is defined, the air in the ventilation space and the slot area contacts the fixed frame and exchanges heat before reaching the second rear end surface. It is possible to provide a canned motor pump in which heat can be radiated through an opening in the facing direction or through a rear cover covering the opening, and the efficiency of radiating heat to the outside is superior to that of conventional canned motor pumps.

1 is an exploded perspective view showing the configuration of an embodiment of a canned motor pump of the present invention; FIG. 1 is a sectional view showing the configuration of an embodiment of a canned motor pump of the present invention; FIG. FIG. 3 is a perspective view illustrating the configuration of a fixed frame in the canned motor pump of the present invention; FIG. 3 is a cross-sectional view showing the structure of a cross section taken along line IV-IV in FIG. 2; 1 is an enlarged cross-sectional view of a main part showing the configuration of an embodiment of a canned motor pump of the present invention; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a canned motor pump according to the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing the configuration of one embodiment of the canned motor pump of the present invention, FIG. 2 is a sectional view showing the configuration of one embodiment of the canned motor pump of the present invention, and FIG. FIG. 4 is a perspective view illustrating the configuration of a fixed frame in the canned motor pump of the present invention, FIG. 4 is a cross-sectional view illustrating the configuration of a section taken along line IV-IV in FIG. 2, and FIG. 1 is an enlarged cross-sectional view of a main part showing the configuration of an embodiment of a canned motor pump; FIG.

As shown in FIG. 1, the canned motor pump roughly comprises a base unit 10, a fixed frame 20, a motor means 30, a front cover 40 and a rear cover 50. As shown in FIG.

As shown in FIG. 2, the base unit 10 has a fixed frame receiving hole extending from a first front end surface 11 to a first rear end surface 12 along the front-rear direction X parallel to the axis L outside the axis L. It is formed of a plastic material in a substantially annular shape so as to have an inner peripheral surface 14 surrounding 13 .

As a plastic material that can be used to construct the base unit 10, it is preferable to use a material with strong chemical resistance, such as polypropylene, glass fiber reinforced polypropylene (GRFPP), polyvinylidene fluoride (PVDF), carbon fiber reinforced ETFE (CFR -ETFE) and the like.

As shown in FIGS. 2 and 3, the fixed frame 20 is fixed by being fitted into the fixed frame receiving hole 13 of the base unit 10, and extends along the front-rear direction X at the first front end of the base unit 10. As shown in FIGS. An aluminum alloy material is formed in a substantially annular shape so as to surround a motor housing hole 23 extending from a second front end surface 21 corresponding to the surface 11 to a second rear end surface 22 corresponding to the first rear end surface 12 of the base unit 10 . formed.

The motor means 30 is fixed by being fitted into the motor housing hole 23 of the fixed frame 20 .

The front cover 40 is attached to the base unit 10 so as to cover the first front end face 11 of the base unit 10 .

The rear cover 50 is attached to the side of the base unit 10 facing the first rear end surface 12 .

As shown in FIG. 3, the fixed frame 20 has an outer peripheral surface 24 facing the inner peripheral surface 14 of the base unit 10 and a plurality of slot areas 25 that open toward the inner peripheral surface 14 of the base unit 10; A partition wall 26 that partitions the plurality of slot areas 25 is formed.

As shown in FIG. 2, the motor means 30 includes a rotating shaft 301 extending along the axis L, a rotor 32 attached to the rotating shaft 301 and rotating together with the rotating shaft 301, and surrounding and holding the rotor 32. A rotor holding portion 31, a stator 33 fixed to the outside of the rotor holding portion 31 and fixed by being fitted into the motor housing hole 23 of the fixed frame 20, and the first front end surface 11 of the base unit 10 are faces. and an impeller 34 arranged to rotate in conjunction with the rotor 32 and covered with the front cover 40 together with the first front end surface 11 on the side of the rotor 32 . Since a conventional motor means 30 can be used, a detailed description of its detailed configuration is omitted.

A front cover 40 attached to the first front end surface 11 of the base unit 10 has two openings, a fluid inlet 41 and a fluid outlet 42 . That is, the front cover 40 defines a fluid passage 43 communicating with a fluid inlet 41 and a fluid outlet 42 together with the first front end surface 11 of the base unit 10 and the impeller 34 of the motor means 30. It functions to send the fluid flowing into the fluid passage 43 from the fluid inlet 41 to the fluid outlet 42 .

In this embodiment, the rear cover 50 is made of an aluminum alloy material, and is attached to the side facing the first rear end surface 12 of the base unit 10 as described above, and is attached to the second rear end surface of the fixed frame 20 . 22 is attached to the base unit 10 and the fixed frame 20 .

Between the inner peripheral surface 14 of the base unit 10 and the outer peripheral surface 24 of the fixed frame 20 is a ventilation space 60 that has an opening facing the second rear end surface 12 and communicates with the slot area 25 . is made.

In this embodiment, the ventilation space 60 is defined by the recessed portion 245 having a depth of about 1 mm formed on the fixed frame 20 side. It is also possible to employ a configuration in which the ventilation space 60 is defined by a concave portion formed by

Further, in this embodiment, the opening facing the second rear end surface 22 of the ventilation space 60 is covered with the rear cover 50 . A plurality of radiating fins 53 protrude from the end portion 52 of the rear cover 50 on the opposite side of the inner side 51 that contacts the fixed frame 20 .

The canned motor pump of this embodiment, as shown in FIG. and communicating with the slot area 25, the air in the ventilation space 60 and the slot area 25 comes into contact with the fixed frame 20 and exchanges heat with the fixed frame. The heat from 20 can be transmitted to the metal rear cover 50 covering the opening facing the second rear end face 22 of the fixed frame 20 and radiated from the heat radiation fins 53 .

Even if the opening facing the second rear end face 22 of the ventilation space 60 is not covered with the rear cover 50, the air is discharged through the opening, thereby fixing the motor means 30. The heat transferred to the frame 20 can be released.

In addition, by forming a plurality of slot areas 25 in the fixed frame 20 made of an aluminum alloy material, the weight of the fixed frame 20 as a whole is reduced, and the area of the contact surface of the fixed frame 20 with the air is increased to dissipate heat. The effect of improving the effect is obtained.

Furthermore, in this embodiment, since the inner side 51 of the rear cover 50 abuts against the fixed frame 20, the heat transferred from the motor means 30 to the fixed frame 20 is directly transferred to the rear cover 50 and formed at the opposite end 52. The heat can also be emitted from a plurality of radiation fins 53 that are connected.

Thus, the canned motor pump of the present invention can provide an effect of releasing heat to the outside with a higher efficiency than conventional ones.

Further, as shown in FIG. 2, the first front end surface 11 of the rotor holding portion 31 of the motor means 30 extends in the front-rear direction X on the inner peripheral surface 14 facing the axis L of the base unit 10 . a first annular holding portion 141 that surrounds and holds the end portion on the side; 1 extending from the outer peripheral edge of the contact surface 142 toward the first rear end surface 12 along the front-rear direction X to surround and hold the end of the stator 33 of the motor means 30 on the first front end surface 11 side. a second annular holding portion 143, a second contact surface 144 substantially orthogonal to the second annular holding portion 143 and in contact with the fixed frame 20, and an outer peripheral edge of the second contact surface 144 extending in the front-rear direction X; a third annular holding portion 145 that extends toward the first rear end face 12 side along the , and surrounds and holds the fixed frame 20; and an annular extending portion 147 extending from the outer peripheral edge of the third contact surface 146 along the front-rear direction X toward the first rear end surface 12 side.

The fixed frame 20 is fitted and fixed in a space defined by the second contact surface 144 and the third annular holding portion 145 .

Furthermore, as shown in FIGS. 2 and 4, in this embodiment, the base unit 10 has a pedestal portion 101 and a holding frame portion 102 defining the fixing frame receiving hole 13 together with the pedestal portion 101. is configured as That is, part of the inner peripheral surface 14 surrounding the fixed frame receiving hole 13 of the base unit 10 (lower portion in FIG. 4) is on the side of the base portion 101, and the other portion (upper portion in FIG. 4) is on the holding frame portion. 102 side.

Two engaging grooves 148 (one left and one right in FIG. 4) are formed in the pedestal 101 and open toward the fixing frame accommodation hole 13 , and correspond to the inner peripheral surface 14 of the holding frame 102 . A plurality of first engaging surfaces 149 facing the fixed frame 20 are formed in the portion where the fixed frame 20 faces. Further, the plurality of first engaging surfaces 149 are all formed in a third annular holding portion 145 that surrounds and holds the fixed frame 20 of the inner peripheral surface 14 . Further, each of the plurality of first engaging surfaces 149 is formed to be in contact with the adjacent first engaging surface 149 at a predetermined obtuse angle.

On the outer peripheral surface 24 of the fixed frame 20, two engaging projections 241 respectively fitted in the two engaging grooves 148 of the base unit 10 corresponding to the above configuration of the base unit 10, and each of the first projections 241 A plurality of second engagement surfaces 243 are formed to respectively contact the engagement surfaces 149 of the second engagement surface 243 .

It should be noted that the first engaging surface 149 and the second engaging surface 243 corresponding to the first engaging surface 149 do not have to be flat, and in this embodiment, they are formed into gently curved surfaces. there is

The plurality of slot areas 25 and partition walls 26 partitioning the plurality of slot areas 25 are formed on the respective second engagement surfaces 243 .

In this embodiment, one concave portion 245 for defining the ventilation space 60 together with the inner peripheral surface 14 of the base unit 10 is formed on each second engaging surface 243 . That is, the slot area 25 formed in each second engaging surface 243 is formed to be further recessed from the recessed portion 245 formed in the second engaging surface 243, and the plurality of slot areas The tip of the partition wall 26 that partitions the base unit 25 is located at a location corresponding to the bottom surface of the recessed portion 245 so as not to come into contact with the inner peripheral surface 14 of the base unit 10 .

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and includes all modifications and equivalent configurations as various configurations included within the spirit and scope of the broadest interpretation. It shall be.

As described above, the canned motor pump of the present invention has an opening facing the second rear end surface between the inner peripheral surface of the base unit and the outer peripheral surface of the fixed frame. , since a ventilation space communicating with the slot area is defined, the air in the ventilation space and the slot area contacts the fixed frame and exchanges heat before reaching the second rear end surface. It is possible to provide a canned motor pump in which heat can be radiated through an opening in the facing direction or through a rear cover covering the opening, and the efficiency of radiating heat to the outside is superior to that of conventional canned motor pumps.

10 Base unit 101 Pedestal part 102 Holding frame part 11 First front end surface 12 First rear end surface 13 Fixed frame receiving hole 14 Inner peripheral surface 141 First annular holding part 142 First contact surface 143 Second annular Holding portion 144 Second contact surface 145 Third annular holding portion 146 Third contact surface 147 Annular extending portion 148 Engaging groove 149 First engaging surface 20 Fixed frame 21 Second front end surface 22 Second rear end surface 23 motor housing hole 24 outer peripheral surface 241 engaging protrusion 243 second engaging surface 245 concave portion 25 slot area 26 partition wall 30 motor means 301 rotating shaft 31 rotor holding portion 32 rotor 33 stator 34 impeller 40 front cover 41 Fluid inlet 42 Fluid outlet 43 Fluid passage 50 Rear cover 51 Inside 52 End 53 Radiation fin 60 Ventilation space L Axis X Front-back direction

Claims (3)

Outside a predetermined axis, the plastic material is formed into a substantially annular shape so as to have an inner peripheral surface surrounding a fixed frame receiving hole extending from the first front end surface to the first rear end surface along the longitudinal direction parallel to the axis. a base unit formed;
It is fitted and fixed in the fixing frame accommodating hole of the base unit, and extends along the front-rear direction from the second front end surface of the base unit corresponding to the first front end surface of the base unit. a fixing frame made of an aluminum alloy material and having a substantially annular shape so as to surround the motor housing hole extending to a second rear end surface corresponding to the first rear end surface;
a motor means fixed by being fitted into the motor housing hole of the fixed frame;
a front cover attached to the base unit so as to cover the first front end surface of the base unit;
The fixed frame has an outer peripheral surface facing the inner peripheral surface of the base unit, a plurality of slot areas opening toward the inner peripheral surface of the base unit, and a partition wall partitioning the plurality of slot areas. , are formed and
Further, between the inner peripheral surface of the base unit and the outer peripheral surface of the fixed frame, there is an opening facing the second rear end surface, and a ventilation space communicating with the slot area is defined. is composed of
mounted on the base unit and the fixed frame so as to cover the first rear end face of the base unit, the second rear end face of the fixed frame and the ventilation space and to abut against the fixed frame. Further comprising a rear cover made of an aluminum alloy material,
A plurality of radiating fins protrude from the end of the rear cover on the opposite side of the inner side contacting the fixed frame,
the motor means includes a rotating shaft extending along the axis;
a rotor that rotates together with the rotating shaft;
a rotor holding portion that surrounds and holds the rotor;
a stator fixed to the outside of the rotor holding portion and fixed by being fitted into the motor housing hole of the fixed frame;
an impeller arranged to rotate in conjunction with the rotor on the side of the base unit facing the first front end face and covered with the front cover together with the first front end face;
and
On the inner peripheral surface of the base unit,
a first annular holding portion extending in the longitudinal direction to surround and hold an end portion of the rotor holding portion of the motor means located on the first front end face side;
a first contact surface that contacts the stator of the motor means substantially perpendicular to the first annular holding portion;
Extending from the outer peripheral edge of the first contact surface to the first rear end face side along the front-rear direction to surround and hold an end portion of the stator of the motor means on the first front end face side. a second annular holding portion for
a second contact surface that is substantially perpendicular to the second annular holding portion and contacts the fixed frame;
a third annular holding portion extending from the outer peripheral edge of the second contact surface toward the first rear end surface along the front-rear direction to surround and hold the fixed frame;
a third contact surface that is substantially orthogonal to the third annular holding portion and contacts the rear cover;
an annular extending portion extending from the outer peripheral edge of the third contact surface to the first rear end surface side along the front-rear direction,
The canned motor pump according to claim 1, wherein the fixed frame is fitted and fixed in a space defined by the second contact surface and the third annular holding portion . The base unit is configured to have a pedestal portion and a holding frame portion defining the fixed frame receiving hole together with the pedestal portion. a plurality of first engaging surfaces facing the fixed frame are formed in a portion corresponding to the inner peripheral surface of the holding frame portion. In addition, each of the plurality of first engagement surfaces is formed to be in contact with the adjacent first engagement surface so as to form a predetermined obtuse angle,
The outer peripheral surface of the fixed frame abuts on the two engaging projections respectively fitted in the two engaging grooves of the base unit and the first engaging surfaces correspondingly. a plurality of second engagement surfaces are formed;
2. The canned motor according to claim 1 , wherein each of said second engaging surfaces is formed with a plurality of said slot areas and said partition walls partitioning said plurality of slot areas. pump. each of the second engagement surfaces is formed with a recessed portion for defining the ventilation space;
3. The canned motor pump according to claim 2 , wherein the slot area formed in each of the second engagement surfaces is formed so as to be further recessed from the recessed portion.

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